package com.zzyl.framework.interceptor;

import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.ObjectUtil;
import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.zzyl.common.exception.base.BaseException;
import com.zzyl.common.utils.StringUtils;
import com.zzyl.common.utils.UserThreadLocal;
import com.zzyl.framework.web.service.TokenService;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class MemberInterceptor implements HandlerInterceptor {
    private final TokenService tokenService;

    public MemberInterceptor(TokenService tokenService) {
        this.tokenService = tokenService;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //获取请求头中token
        String token= request.getHeader("authorization");
        //判断token是否为空
        if(StringUtils.isEmpty(token)){
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }
        //解析token并校验
        Claims claims = tokenService.parseToken(token);
        if(ObjectUtil.isEmpty(claims)){
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }
        //校验
        // 解析token中的数据
        Long userId = MapUtil.get(claims, "userId", Long.class);
        if (ObjectUtil.isEmpty(userId)) {
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            throw new BaseException("认证失败");
        }
        //存储用户信息并放行
        UserThreadLocal.set((Long) userId);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {


        UserThreadLocal.remove();
    }
}
